8x8 grid quare in C

#include 
#include 

int iterator_1 = 0; //iterator for the cieling & floor
int iterator_2 = 0; //iterator for the walls

void plusminus() //Create the dashed floor and cieling 
 {
  printf("+----+----+----+----+----+----+----+----+\n");
 }

void blankbar() //Create the lined box's walls
 {
  printf("|    |    |    |    |    |    |    |    |\n");
 }

int main(int argc, char** argv)
 {
  while(iterator_1 < 8) // Run it 8 times, only doing top to bottom
   {
    plusminus(); //Call plusminus to create the first cieling
    ++iterator_1; 
    while (iterator_2 < 3) //create the walls
     {
      blankbar();
      ++iterator_2;
     }
    iterator_2 = 0;
   }
  plusminus(); //creating the last floor
  return 0;
 }